Asked by Lauren Devine on Jul 13, 2024
Verified
What event occurs first in the process of hemostasis?
A) Platelets stick together.
B) Platelets form a plug.
C) An enzyme cascade activates thrombin.
D) The injured vessel constricts.
E) Fibrin forms a clot.
Hemostasis
The physiological process by which bleeding ceases, involving blood vessel constriction and clot formation.
Thrombin
An enzyme in blood plasma that causes the clotting of blood by converting fibrinogen to fibrin.
- Grasp the sequence of events and body responses in hemostasis.
Verified Answer
JL
Jeraed LighthizerJul 16, 2024
Final Answer :
D
Explanation :
The injured vessel constricts first in order to reduce blood flow to the area and limit blood loss. This is known as vascular spasm.
Learning Objectives
- Grasp the sequence of events and body responses in hemostasis.